Self-locking adjustable shore.



E. R'. BELL. sur Lacuna AmumsLe suoni. APPLICATION FILED MH. l?. ll.

1 ,273,81 1 Patented July 30, 191s.

UNITED STATES PATENT OFFICE.

EARL R. BELL, OF COVINGTON, KENTUCKY, ASSIGNOR OF ONE-HALF TO JOSEPH NEYER, JR., OF CINCINNATI, OHIO,

Specification of Letters Patent.

Patented J nly 30, 1918.

' Application led January 17, 1917. Serial No. 142:851.

To all 107mm, it may concern.'

lle it known that` L hun. l. Brul, a citifau of the limited-States. residil'l,|r at Covington, in the county of Kenton-aud State ot' kentucky, have'iuvcidcd certain new and useful Impn'n'ements iu Seit-boeking Adjustable Shores; and 1 do hereby declare the following' to' be a full. clear. and exact de` scription of the invention. auch as will enahle others skilled in the art to which it` apl'wrtains to make and use the saine.

This invention relates to improvements in adjustable shores.

The object of' this invention is the provision of an adjustable shore nhich may be adjusted to various lengtha` without injuryy to the material ot' which the strut or shore is cou'xposed and is so constructed as to automatically lock itself in its adjusted position.

A still further object of this invention is the proi'ision of a hase, a pair of spaced nprights' secured to the hase, adjustable member slidably mounted between the, standv ard.4 and means arranged between the side members` or standards for automatically holding and lockingr the adjusting;r menher.

A still AFurther object of this invention is the. provision of a SeliI lockingr adjustable.

shore ot' this character which will be simple practical and eoxn|n1ratively inexpensive in eolnstruction and one that can be manufactured and sold at a low cost.

lilith. these and other objects in view the invention consists in the, novel` combination and arrangement. of parts hereinafter more fully described and set forth in the claims hereto appended.

ln the drawing-1- Figure 1 is a` front eievation of my irnproved self' locking;- shore as made iu accordance with this invention,

Fig. 2 is a longitudinal` sectional view of the. same, and l Fig. 3 is a transverse sectional view taken on the line BAB of Fig. l.

Li ko numerals of references designate cap reapomlihpr parts and all the figures .`l` t ic drawing.

Referring mori` particularly lo the drawing;r the numeral 'I desiguales a rectangular hase which may be eonstrlwted. of wood, metal or any other material suitable for the purpose. i Secured to the upper side of the hase and extending vertically therefrom is a pair of secured to the upper ends of the standards in any suitable manner suitable for the purpose.

A metal supporting strap 5 has secured tranaversely across the rear faces of the standards 2 adjacent the upper ends thereof and rigidly supports the standards in spaced relation to one` another.

A second reinforcing strap-[5 is Secured to the trout faces of the standards and is arranged transverselythereaeross and coperates.- with the strap 5 in holding the standards against separationv or collapsing inwardly or outwardly when assembled.

A substantially rectangular Isliding block 't is located between the standards l and is provided centrally on its upper face with the retaining lug the purpose of which will be lwreinafter morel fully described.

llemovahly secured to the front and rear facesl ot the supportingr bloek 7 are the straps il which are secured thereto by suitable fas'- ening means il which straps have their ends extended heyond the side members 2 and bent angularly as at 10 to engage the outer sidev faces of the standards Q and constitute guides permittingr the upward and downward sliding movement of the supporting block 7. 4

A supporting tube or pipe 1() is slidably arranged through the cap Ik and .spacing block it cent-rally thereof and has its inner Yend removably.Iitted about the lug,lr 8 ot the Isupporting,r block 7 as eli-arly shown in Fig. 2 ot' the drawing. The upper end of Said supporting tube or pipe l0 is provided with screwtlncads l1 on which is secured a cap l2 which is adapted to enfragre an obstacle to he isupported when the device is in use.

A pair ot' ysubstautiall)` rectangular metal clutch plates' lll are each provided with Central openings ll and alidably arranged about; the tuhc. The clutch plates lfl are each .ar-- ranged between or located between the standards 2 and have one end resting upon the re` intorcingr cdraps 5 and (l and are arranged in superpoacd relation as clearly Iahovvn in Fig. f ot the drawing and when in clutch Yat ing tube or pipe l() in either raised or anyl of its adjusted positions.

[t being understood that when it is desired to release or permit the supporting,

' wardly which will be clearly understoodby tube or pipe 10 to be lifted upwardly or let down lit is only necessary to raisb'the clutch plates 13 to horizontal positions as shown at in dotted lines and the tube is automatically released and permitted to go downwardly or outwardly as desired.

In the assembling o'ftbe device and use:

The standards are arranged upon the upper side of the base 1 and the cap is positioned it the upper ends thereof, the straps 5 and Gare secured to the standards, the supporting block is arranged or located between the standards 2. side straps are positioned around the standards 2 and are removably secured to the supporting block, the tube is arranged vertically through the cap and spacing block and has its inner end or lower end removably secured to the supporting block. Clutch plates are arranged between the standards 2 and one ot' their edges resting upon the upper longitudinal edgeof the reinforcing straps 5 and 6 and the tube is extended through the opening 14 in these plates.

When it `is desired to raise the tube to varied or adjusted positions it is only necessary to apply a pressure oir the underside of the cap 12 and lift upwardly thus pulling the tube or pipe 10 out to the required length and by releasing this pressure the plates drop to an inclined position thus automatically locking the tube in its adjusted position.

. b When t'is desired to release the tube or pipe it is only necessary to raise the clutch plates 13 to a horizontal position thus permlttlng the tube or pipe to be moved inreferrlng to the drawings.

What is claimed is:

A self locking shore f the class set forth inrludiug a rectangu ar base, a spaced standards secured to and rislng vertically from the upper side 4of the base, a spacing block and cap secured to and. con necting the upper ends of the standards, a tube slidably arranged between the standards and centrally through the spacing block or cap, a cap on the u per end of the tube, a supporting block coated between the standards and removably secured to the lower inner end of the tube, guides carried by the block and engaging the sides of the standards to prevent it from shifting laterally during upward and downward movemen blocks secured to the opposite sides'of the tandards, a fish plate surrounding the tube having one edge resting upon the u per edges of the straps to hold the tube 1n its adjusted position when moved within the standard.

In testimony whereof I afi-lx my signatur Y in'presence of two witnesses.

4EARL R. BELL.

`Witnesses:

FRANK G. KULLMANN,

H. B. MrrHoErER.

air ci 

